Quran 84:21 from Surah Al-Inshiqaaq on Divine Marvels.
وَإِذَا قُرِئَ عَلَيۡهِمُ ٱلۡقُرۡءَانُ لَا يَسۡجُدُونَۤ۩
English translation: And when is recited to them the Quran not they prostrate
Transliteration: wa-idha quri-a alayhimu al-qur'anu la yasjuduna